How To Use A Resistor For 12 Volt To 5 Volt

Electrical energy follows several physical laws. One of these laws, Kirchhoff's Voltage Law, explains that the sum of the voltage drops around a closed circuit loop must equal zero. In a circuit with multiple electrical resistors, the voltage will drop at each resistor electrical joint. This can be useful if you need to obtain five volts from a 12-volt power source.

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Step 1

Cut two pieces of electrical wire. Strip ½ an inch of insulation from the ends of each wire. Verify that the power supply is turned off.

Step 2

Twist together one end of the first wire with one of the leads from the 1.4-kiloohm resistor. Connect the loose end of this wire to the positive terminal on the power supply.

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Step 3

Twist together the free lead from the 1.4-kiloohm resistor with one of the leads from the 1-kiloohm resistor.

Step 4

Twist together the free lead from the 1-kiloohm resistor with one end of the second wire. Connect the loose end of this wire to the negative terminal on the power supply. Turn the power supply on

Step 5

Turn on the voltmeter and set the scale to measure "Volts DC." Place the black voltmeter probe on the electrical joint between the second wire and the 1-kiloohm resistor. Place the red voltmeter probe on the electrical joint between the two resistors. The voltage across the resistor will be approximately 5 volts.

Things Needed

  • 12-volt DC power supply
  • 1.4-kiloohm resistor
  • 1-kiloohm resistor
  • Electrical wire
  • Electrical pliers
  • Voltmeter

TL;DR (Too Long; Didn't Read)

Electrical resistors can vary in quality. The resistance value of a metal-film resistor is accurate to within 1%. Carbon-film resistors are accurate to within 5% tolerance, while the resistance of a wirewound resistor can vary as much as 10%.

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Cite This Article

MLA

Sandoval, David. "How To Use A Resistor For 12 Volt To 5 Volt" sciencing.com, https://www.sciencing.com/use-12-volt-5-volt-8155261/. 24 April 2017.

APA

Sandoval, David. (2017, April 24). How To Use A Resistor For 12 Volt To 5 Volt. sciencing.com. Retrieved from https://www.sciencing.com/use-12-volt-5-volt-8155261/

Chicago

Sandoval, David. How To Use A Resistor For 12 Volt To 5 Volt last modified August 30, 2022. https://www.sciencing.com/use-12-volt-5-volt-8155261/

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